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Toyota Sienna Service Manual: How to proceed with troubleshooting

Toyota Sienna Service Manual / Engine / 2Gr-fe engine control system / Sfi system / How to proceed with troubleshooting

HINT:

The intelligent tester can be used in steps 2, 3, 4, 6 and 9.

1 VEHICLE BROUGHT TO WORKSHOP

2 CONNECT INTELLIGENT TESTER TO DLC3

HINT:

If the display indicates a communication fault in the tester, inspect the DLC3.

3 CHECK DTC AND FREEZE FRAME DATA

(a) Check for DTC(s) and freeze frame data (See page ES- 40).

HINT:

Record or print the DTCs and freeze frame data, if necessary.

4 CLEAR DTC AND FREEZE FRAME DATA

(a) Clear the DTC(s) and freeze frame data (See page ES- 40).

5 CONDUCT VISUAL INSPECTION

6 SET CHECK MODE DIAGNOSIS

(a) Set the check mode (See page ES-43).

7 CONFIRM PROBLEM SYMPTOMS

HINT:

If the engine does not start, perform steps 9 and 11 first.

Result

8 SIMULATE SYMPTOMS

9 CHECK FOR DTCS

(a) Check for DTCs (See page ES-39).

Result

10 REFER TO DTC CHART

HINT:

Refer to the DTC chart (See page ES-56).

GO TO STEP 13

11 CONDUCT BASIC INSPECTION

HINT:

Refer to "BASIC INSPECTION" (See page ES-13).

Result

12 REFER TO PROBLEM SYMPTOMS TABLE

HINT:

Refer to "PROBLEM SYMPTOMS TABLE" (See page ES- 27).

Result

13 CHECK ECM POWER SOURCE CIRCUIT

HINT:

Refer to "ECM POWER SOURCE CIRCUIT" (See page ES- 437).

14 CONDUCT CIRCUIT INSPECTION

Result

15 CHECK FOR INTERMITTENT PROBLEMS

HINT:

Refer to "CHECK FOR INTERMITTENT PROBLEMS" (See page ES-13).

GO TO STEP 17

16 CONDUCT PARTS INSPECTION

17 IDENTIFY PROBLEM

18 ADJUST AND/OR REPAIR

19 CONDUCT CONFIRMATION TEST

END

System diagram
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Check for intermittent problems
1. CHECK FOR INTERMITTENT PROBLEMS HINT: For use of the intelligent tester only: Inspect the vehicle's ECM using check mode. Intermittent problems are easier to detect with an intelligent teste ...

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How to proceed with troubleshooting
1 VEHICLE BROUGHT INTO A WORKSHOP 2 DIAGNOSTIC QUESTIONING AND SYMPTOM CONFIRMATION Ask the customer about symptoms and confirm malfunctions. 3 CONFIRM THE SYSTEM NORMAL CONDITION 4 CHECK DTC HINT: If the system cannot enter the diagnosis mode, inspect each AVC-LAN communication signal ...

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